Well I don't blame people for having that mentality. That's like being mad at people who want MK players to scrooge and play gayer. Wanting the gayest thing to happen, if it's legal and allowed, is asking people to play more optimal.
As far as infinites go, idk. We have such a subjective line of what's allowable and what's not that you can easily find different contradicting rules on varying infinites. Even taking IC's out of the equation, you have varying rules on standing infinites, walking infinites, situational infinites (like normally you can't infinite a character, but then you get them at a slope change/edge/etc and it turns into one), etc.
Take grab release infinites for example. To do damage during these infinites, and to keep some of them working, you have to pummel the other character. Technically, characters should be able to get out of most grab release infinites that require a pummel for multiple reasons. If you adopt the super K Prime mash method for example, you can get out of grabs extremely quick. This makes pummeling under certain % thresholds basically give the person a free get out of jail card if your infinite only works if they air release, and if you need a ground release they can try to time this mash period to go after you pummel and try to get out under the small windows available.
Does this mean we should ban the infinite, even if there are ways out of it that definitely have been demonstrated? Maybe, maybe not. But that's probably something not many people considered when just saying "**** infinites, they are gay."
As far as DK goes also, technically you see him do more than just regrab over and over. He's moving around to make sure you can't do anything right? I mean even he has to do more work than Dedede who just sits there and regrabs. Which brings up another thing. For Dedede's infinite requiring a pummel to unstale the Dthrow, why remove his infinite then? Dedede's pummel is very slow and takes up a lot of time before being "done". Because of this, he has probably the largest "mash window" for someone being grabbed to escape from.
His infinite REQUIRES the pummel. Otherwise they get out. But by the very act of pummeling, you allow the person a huge window to get out. So, why ban it then if it stops working because of this condition? I mean you could still ban it for being gay, or for being boring to watch. But at that point you're basically admitting to not banning it specifically because it breaks the game competitively, but because it's "dumb".
Either way, UNITYYYYYYYY *Rick James out*